They can be programmed for constant current, constant power, and the more advanced ones can follow load patterns that you can program for duty cycle testing. Most of them will have various protections built in to make them harder to zap, for example if one of the switching MOSFETs fails and starts conducting through some hundreds of volts (in some designs).

They can be programmed for constant current, constant power, and the more advanced ones can follow load patterns that you can program for duty cycle testing. Most of them will have various protections built in to make them harder to zap, for example if one of the switching MOSFETs fails and starts conducting through some hundreds of volts (in some designs).

When it's a more rare PSU, I use and alternostat/variable PSU for pushing up gently the primary voltage.I was talking about green wire just for starting up the PSU. This one doesn't need a load (HD/mobo) for powering up.In add, i use my tiny tektronix scope just to see the ripple/noise of the main output rails (5V 12V 3.3V)